From patchwork Tue Apr 20 12:04:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 425512 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B719C43460 for ; Tue, 20 Apr 2021 12:05:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16E7B613C3 for ; Tue, 20 Apr 2021 12:05:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232197AbhDTMF5 (ORCPT ); Tue, 20 Apr 2021 08:05:57 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:57980 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232164AbhDTMF5 (ORCPT ); Tue, 20 Apr 2021 08:05:57 -0400 Received: from deskari.lan (91-157-208-71.elisa-laajakaista.fi [91.157.208.71]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id AE2871051; Tue, 20 Apr 2021 14:05:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1618920323; bh=WFtTL1DzuHz31fUfyAMy1ytmb2WZ7PSXV0A0rsVj8nM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t0hHJkozX9co7gWGv6M6o8IdP6g2piKMGO2R2ylURrlWqF4s0tzEGLIW4g7YXnPNZ BucMPoTSaSH2DQr3zRYBYoDq1H+LdNVG0Rk+NJBeEZHDmc8x4JPEna6UVqnesvlRRe ejkx4WBnRX12vYCNAlG9vzy4B8hnRhPLRbtDsCmU= From: Tomi Valkeinen To: Benoit Parrot , Laurent Pinchart , Pratyush Yadav , Lokesh Vutla , linux-media@vger.kernel.org Cc: Tomi Valkeinen Subject: [PATCH v2 17/35] media: ti-vpe: cal: allocate pix proc dynamically Date: Tue, 20 Apr 2021 15:04:15 +0300 Message-Id: <20210420120433.902394-18-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210420120433.902394-1-tomi.valkeinen@ideasonboard.com> References: <20210420120433.902394-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org CAL has 4 pixel processing units but the units are not needed e.g. for metadata. As we could be capturing 4 pixel streams and 4 metadata streams, i.e. using 8 DMA contexts, we cannot assign a pixel processing unit to every DMA context. Instead we need to reserve a pixel processing unit only when needed. Add functions to reserve and release a pix proc unit, and use them in cal_ctx_prepare/unprepare. Note that for the time being we still always reserve a pix proc unit. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- drivers/media/platform/ti-vpe/cal.c | 44 +++++++++++++++++++++++++++-- drivers/media/platform/ti-vpe/cal.h | 2 ++ 2 files changed, 44 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c index f47d2fa31a39..5ab87c9d3707 100644 --- a/drivers/media/platform/ti-vpe/cal.c +++ b/drivers/media/platform/ti-vpe/cal.c @@ -290,6 +290,37 @@ void cal_quickdump_regs(struct cal_dev *cal) * ------------------------------------------------------------------ */ +#define CAL_MAX_PIX_PROC 4 + +static int cal_reserve_pix_proc(struct cal_dev *cal) +{ + unsigned long ret; + + spin_lock(&cal->v4l2_dev.lock); + + ret = find_first_zero_bit(&cal->reserved_pix_proc_mask, CAL_MAX_PIX_PROC); + + if (ret == CAL_MAX_PIX_PROC) { + spin_unlock(&cal->v4l2_dev.lock); + return -ENOSPC; + } + + cal->reserved_pix_proc_mask |= BIT(ret); + + spin_unlock(&cal->v4l2_dev.lock); + + return ret; +} + +static void cal_release_pix_proc(struct cal_dev *cal, unsigned int pix_proc_num) +{ + spin_lock(&cal->v4l2_dev.lock); + + cal->reserved_pix_proc_mask &= ~BIT(pix_proc_num); + + spin_unlock(&cal->v4l2_dev.lock); +} + static void cal_ctx_csi2_config(struct cal_ctx *ctx) { u32 val; @@ -433,12 +464,22 @@ static bool cal_ctx_wr_dma_stopped(struct cal_ctx *ctx) int cal_ctx_prepare(struct cal_ctx *ctx) { + int ret; + + ret = cal_reserve_pix_proc(ctx->cal); + if (ret < 0) { + ctx_err(ctx, "Failed to reserve pix proc: %d\n", ret); + return ret; + } + + ctx->pix_proc = ret; + return 0; } void cal_ctx_unprepare(struct cal_ctx *ctx) { - + cal_release_pix_proc(ctx->cal, ctx->pix_proc); } void cal_ctx_start(struct cal_ctx *ctx) @@ -873,7 +914,6 @@ static struct cal_ctx *cal_ctx_create(struct cal_dev *cal, int inst) ctx->dma_ctx = inst; ctx->csi2_ctx = inst; ctx->cport = inst; - ctx->pix_proc = inst; ret = cal_ctx_v4l2_init(ctx); if (ret) diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h index e4db2a905f68..5d8b3193be7d 100644 --- a/drivers/media/platform/ti-vpe/cal.h +++ b/drivers/media/platform/ti-vpe/cal.h @@ -188,6 +188,8 @@ struct cal_dev { struct media_device mdev; struct v4l2_device v4l2_dev; struct v4l2_async_notifier notifier; + + unsigned long reserved_pix_proc_mask; }; /*